25.I can’t buy the house because it is too expensive.
If .....................................................................................................................................
26. They watched an interesting film last night
An interesting ………………………………………………………………………….
27. Don’t drive fast or you’ll have an accident
If………………………………………………………………………………………..
28. Listen to your teacher attentively and you’ll understand the lesson.
If you…………………………………………………………………………………….
29. .Mary asked, “Tom, who will open the box for me?”
Mary ...............................................................................................................................
30.The teacher asked him, “Do you think before you answer?”
The teacher .....................................................................................................................